Glossary
Young’s Modulus or Storage Modulus
Young’s modulus, or Elasticity and Modulus of ElasticityRubber elasticity or entropy elasticity describes the resistance of any rubber or elastomer system against an externally applied deformation or strain. storage modulus, is a mechanical property that measures the stiffness of a solid material. It defines the relationship between StressStress is defined as a level of force applied on a sample with a well-defined cross section. (Stress = force/area). Samples having a circular or rectangular cross section can be compressed or stretched. Elastic materials like rubber can be stretched up to 5 to 10 times their original length.stress and StrainStrain describes a deformation of a material, which is loaded mechanically by an external force or stress. Rubber compounds show creep properties, if a static load is applied.strain in a material in the linear elasticity region of a uniaxial deformation.
Calculation of Young’s Modulus:
where:
E is Young’s modulus
σ is the uniaxial StressStress is defined as a level of force applied on a sample with a well-defined cross section. (Stress = force/area). Samples having a circular or rectangular cross section can be compressed or stretched. Elastic materials like rubber can be stretched up to 5 to 10 times their original length.stress
ε is the StrainStrain describes a deformation of a material, which is loaded mechanically by an external force or stress. Rubber compounds show creep properties, if a static load is applied.strain along the direction of the applied StressStress is defined as a level of force applied on a sample with a well-defined cross section. (Stress = force/area). Samples having a circular or rectangular cross section can be compressed or stretched. Elastic materials like rubber can be stretched up to 5 to 10 times their original length.stress
Relationship between the Elastic Moduli
E = 2G(1+μ) = 3K(1-2μ)
where:
E is Young’s modulus
G is the shear modulus
K is the bulk modulus
μ is the Poisson number
The figure depicts a given uniaxial StressStress is defined as a level of force applied on a sample with a well-defined cross section. (Stress = force/area). Samples having a circular or rectangular cross section can be compressed or stretched. Elastic materials like rubber can be stretched up to 5 to 10 times their original length.stress for tensile (extension, left) or pressure (compression, right). A material with low stiffness (red) provides a higher deformation than a material with high stiffness (blue). Young’s modulus is a measure of the stiffness.
